Add nested _vercel subdomain for Vercel TXT verification

domains/_vercel.kylejoshua.json

@@ -0,0 +1,9 @@
+{
+  "owner": {
+    "username": "KyleJoshuaApao",
+    "email": "kylejoshua878@gmail.com"
+  },
+  "records": {
+    "TXT": "vc-domain-verify=kylejoshua.is-a.dev,53236f4800b1740583ea"
+  }
+}